martinus

// SPDX-License-Identifier: MIT
//
// memlz 0.4 beta - extremely fast header-only compression library for C and C++ on x64/x86
//
// Copyright 2025 - 2026, Lasse Mikkel Reinhold
//
// Attributions: This is an 8-byte-word version of the Chameleon compression algorithmn
// by Guillaume Voirin. Thanks to Charles Bloom for his simple reference implementation and 
// for the original LZP-style of algorithms.

martinus

Linux Setup for Parents

Fedora Silverblue, default installation.

• No automatic login (it's strange UI)

Automatic Updates

Set up fully automatic updates, in /etc/rpm-ostreed.conf set AutomaticUpdatePolicy=stage

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Making check in src
make[1]: Entering directory '/home/martinus/git/github.com/martinus/bitcoin/src'
make[2]: Entering directory '/home/martinus/git/github.com/martinus/bitcoin/src'
make[3]: Entering directory '/home/martinus/git/github.com/martinus/bitcoin'
make[3]: Leaving directory '/home/martinus/git/github.com/martinus/bitcoin'
  GEN      obj/build.h
make  minisketch/test
make[3]: Entering directory '/home/martinus/git/github.com/martinus/bitcoin/src'
make[3]: 'minisketch/test' is up to date.
make[3]: Leaving directory '/home/martinus/git/github.com/martinus/bitcoin/src'

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Benchmark System

• AMD Ryzen 9 7950X
• ./configure CXX=clang++ CC=clang && make && ./bench
• clang version 17.0.4 (Fedora 17.0.4-1.fc39)

master (d3e29db)

Benchmark                     ,    Min(us)    ,    Avg(us)    ,    Max(us)

martinus

I'm now on #nostr: npub1yyz6z2ze997eu5pe94fmy09rfjce0gqk2u62ptq7uudjcfrmdlfs0enkcm

martinus

Configuration

DOTFILES=$HOME/git/martinus__dotfiles3
alias dotfiles="GIT_WORK_TREE=$HOME GIT_DIR=$DOTFILES"
alias dgit="dotfiles git"

Initializing

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CPU

get CPU hot:

stress-ng -t 2200 --matrix 0 --matrix-size 128

Monitor CPU with

sudo intel-undervolt measure

martinus

/* Fast open-addressing hash table.
 *
 * Copyright 2022 Joaquin M Lopez Munoz.
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * See https://www.boost.org/libs/unordered for library home page.
 */

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/**
 * TODO
 *
 * Usage is like so:
 *
 * using CCoinsMap = std::pmr::unordered_map<COutPoint, CCoinsCacheEntry, SaltedOutpointHasher>;
 * auto mr = NodePoolResource<256>(); // large enough to fit nodes size
 * auto map = CCoinsMap{0, SaltedOutpointHasher{}, std::equal_to<COutPoint>{}, &mr};
 */
template <size_t MAX_BLOCK_SIZE_BYTES>

martinus

#pragma once

#include <cstddef>
#include <type_traits>

namespace basics {

class Times {
	size_t m_times;